but if you are unaware of this problem it can cause serious grief

Running Relv3.010 on WINDOWS 10.

It would seem ABS(INTEGER) always incorrectly displays a rational but is correctly recognized as an integer.

Code: Select all

```
WRITELN ABS(14) ; //14.0
WRITELN ABS(7); //7.0
WRITELN ABS(-5) ; //5.0
WRITELN ABS ( (-15*2)/5); //6.0
WRITELN TYPE_OF(ABS(1)); //Scalar("INTEGER")
WRITELN TYPE_OF(ABS(-1)); //Scalar("INTEGER")
WRITELN REL{TUP{X1 ABS(4), X2 4.0},TUP{X1 ABS(-5), X2 -5.0}} ;
/*
RELATION {X1 INTEGER, X2 RATIONAL} {
TUPLE {X1 4.0, X2 4.0},
TUPLE {X1 5.0, X2 -5.0}
*/
```

Code: Select all

```
WRITELN ABS(-5)*2 ; //ERROR: RS0278: No run-time invocation targets found for OP_TIMES(RATIONAL, INTEGER) RETURNS INTEGER
WRITELN TYPE_OF ( ABS(-5)*2 ) ; //Scalar("INTEGER")
WRITELN TYPE_OF ( ABS(-5)*2.0 ) ; //ERROR: RS0055: Could not find operator OP_TIMES(INTEGER, RATIONAL) RETURNS RATIONAL
```